| 摘要 |
1,163,643. Sintered zirconium-yttria bodies. ATOMIC ENERGY OF CANADA Ltd. June 21, 1967 [June 21, 1966], No. 28541/67. Headings C7A and C7D. A sintered Zr-YO 2 body is made by compacting and sintering a powder mixture of ZrH 2 and fused YO 2 . The mixture contains 1-20% by volume of YO 2 which has a particle size of 0À05 to 5 microns. The mixture is hall milled in an argon atmosphere, compacted at 7À03 x 10<SP>7</SP> to 8À44 x 10<SP>7</SP> kg. /m<SP>2</SP> and sintered in vacuum for 6-8 hours at 1200‹C. The sintered compact may be rehydrided by heating in hydrogen at 800‹-1000‹C., recrushed recompacted and resintered in vacuum. This rehydriding, and resintering may also be carried out a second time. In an alternative embodiment the powder mixture of ZrH 2 and YO 2 may be sintered at 1000‹C. and then hot rolled in vacuum at 925 ‹- 1100‹C. to a 50-60% reduction in area. |
